. that's your choice. >> he talks religion, reason, and what america needs now. >> the good life isn't good enough. what you need is the better life. >> the election, the economy, same-sex marriage and more, to the issues that really matter. >> you know why we have to change the constitution? it was a flawed document. it was made by men. >> what does god mean to you? this is "piers morgan tonight." >> good evening, and happy holidays and welcome to a special "piers morgan tonight." joining me, one of the most influential spiritual leaders in the world, rick warren. we're going to talk about politics, sins, and much, much more. he's the author of "a purpose driven life." >> it's good to be here with you. >> what is the purpose of christmas? >> you know, the angels in the story the first christmas said three things. those three statements say the three purposes of christmas. they are celebration, salvation, and reconciliation. first thing the angels said was, i bring you good news of great joy. which shall be for all people. by the way, christmas isn't just for christians. they say it'